-----------------------------------
いつか， 何時か
1. sometime, someday, one day, some time or other, the other day, in due course, in time
tbd
-----------------------------------
良い， 好い， 善い， 佳い， 吉い， 宜い， よい， えい
1. good, excellent, fine, nice, pleasant, agreeable
2. sufficient, enough, ready, prepared
3. profitable (deal, business offer, etc.), beneficial
4. OK, all right, fine, no problem
5. easy to ...
tbd
は
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis
指示句子的主题；表示与另一选项（无论是否明确提及）形成对比；表示强调
